i had that happen to 2 back molars. just crumbled to dust. i was horrified.

the dentist said it was probably a fever when the adult molars were forming around 4 or 5, which made them weaker than they should have been. he assured me it wasn't bad dental hygeine, as i had freaked out a little about it. i'm a religious brusher/listerine person. lol

I work for a dentist. You should be seen now. They may only do something temporary for now though, which is okay. My dentist won't do permanent restorations until the 3rd trimester. Oh, and NO nitrous aka laughing gas! ;)

Dental care is important, even more so while your pregnant. Get your regular cleanings and what not. Iv had multiple cavities fixed and recently got 2 molars pulled out because they broke. It's completely safe to get dental work done during pregnancy. Just make sure you tell them your pregnant and they'll take extra precautions and use a different type of numbing medication if needed :)